Join 2 rec files XDJ-RX in right time

Hi, i have a XDJ-RX2, so i have recorded two files because i played 5 hours (records max are 3 hours per file), and now i am trying to join with audacity, but in every time the rec files doesnt fit perfect.

You notice that are paste files, does anyone know which is the right time to paste the second file in the first one and make it sound perfect?

thanks in advance

best regards